Start probes only after network is connected.

webrtc/call/bitrate_allocator.cc

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  *
  */
@@ skipping 30 matching lines @@
     return 1.0;
 
   uint32_t media_bitrate = allocated_bitrate - protection_bitrate;
   return media_bitrate / static_cast<double>(allocated_bitrate);
 }
 }  // namespace
 
 BitrateAllocator::BitrateAllocator(LimitObserver* limit_observer)
     : limit_observer_(limit_observer),
       bitrate_observer_configs_(),
-      last_bitrate_bps_(kDefaultBitrateBps),
+      last_bitrate_bps_(0),
       last_non_zero_bitrate_bps_(kDefaultBitrateBps),
       last_fraction_loss_(0),
       last_rtt_(0),
       num_pause_events_(0),
       clock_(Clock::GetRealTimeClock()),
       last_bwe_log_time_(0) {
   sequenced_checker_.Detach();
 }
 
 BitrateAllocator::~BitrateAllocator() {
@@ skipping 348 matching lines @@
       (bitrate - sum_min_bitrates) /
       static_cast<uint32_t>(bitrate_observer_configs_.size());
   for (const auto& observer_config : bitrate_observer_configs_) {
     if (observer_config.min_bitrate_bps + extra_bitrate_per_observer <
         MinBitrateWithHysteresis(observer_config))
       return false;
   }
   return true;
 }
 }  // namespace webrtc